Endoscopy: why and when.
Johnsen
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D004415:Dyspepsia / Q000175:diagnosis / Q000628:therapy; D016099:Endoscopy, Gastrointestinal; D005194:Family Practice; D005767:Gastrointestinal Diseases / Q000175:diagnosis*; D005770:Gastrointestinal Neoplasms / Q000175:diagnosis; D006801:Humans; D010437:Peptic Ulcer / Q000175:diagnosis / Q000628:therapy